Never accidentally send sensitive files outside your company again.

OfficeFileGuard automatically blocks emails containing confidential Office files when sent to external recipients.

Works with Outlook classic (desktop) — new Outlook & web version coming soon.

Stay safe. Stay focused.

Download Now
for Windows (.exe)
Watch it in action
Privacy-first
Works locally
No telemetry
No restrictions. Pay only if it's useful for you.
🚫
Sending blocked!
This email contains confidential file(s) and is addressed to external recipient(s).
Review Recipients
XLSX
Trusted. Verified. Easy to deploy.
Install via WinGet
OfficeFileGuard is officially available in the Windows Package Manager.
> winget install BlueCrocodile.OfficeFileGuard
Email blocked demo

1. Email blocked

When you try to send a confidential file to an external recipient.

Mark file as confidential demo

2. Mark files as confidential

Right-click on any Office file and mark it as confidential.

A mistake that can be costly

It only takes one click to send a confidential document to the wrong person.

And when it happens… it's already too late.

It happened to me. More than once.

That's why I created OfficeFileGuard: to eliminate this risk completely.

🛡️

How it works

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1

Mark your files

Right-click → "Mark as Confidential". A lock overlay appears on the file.

2

Compose your email

Write your email as you normally do.

3

Stay protected

If external recipients are detected, sending is blocked and you're alerted.

Simple protection, right where you work

OfficeFileGuard runs quietly in the background and helps you make safer decisions before you hit send.

Detects risks
Identifies confidential attachments and external recipients before emails leave your organization.
Works locally
All checks are performed on your computer. Your data never leaves your device.
Non-intrusive
Smart alerts that don't interrupt your flow. You stay in control at all times.
Built for Outlook
Seamlessly integrated with Outlook on Windows. No changes to your routine.
🐷✨💚

Pay only if it's truly valuable

Download and use OfficeFileGuard without any limitations.

If you realize it helps you avoid even one serious mistake, the price is symbolic:

If you help by suggesting improvements and new features, it's free for you. Forever.

✓
No subscriptions
✓
No hidden fees
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No feature restrictions
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It will always keep working, regardless of payments
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No Ads
Download Now
for Windows (.exe)
🪟
Windows 10 / 11
Outlook classic (desktop only)
New Outlook & web version: coming soon
.docx, .xlsx, .pptx & more

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